I think a lot of it is the OB giving women the choice in what to do.
When i was pg with Alex and went for my booking appt the m/w said i would have a choice between VBAC and c-section not once until then did i even think i wouldn't have a VBAC. But once that idea was put into my head i choose a c-section.

This time i was told they wouldn't let me try VBAC not sure what would have happend if i changed hospital but i wanted to stay closer to home.